Those bags look really heavy, ........ I help you with them?
may / can
The doctor said you ....... eat so late at night.
mustn't
Yesterday, Henry ....... be at the conference by 7 a.m. so he left the house early.
had to
I'm sorry, Mr Jones isn't in his office today, he ..... definitely be back tomorrow.
will
You ...... call Linda, I've already done that.
don't need to
They ..... find a good excuse not to go to Tom's barbecue, so they ended up going.
weren't abel to
...... I borrow your black boots? Ipromise to return them tomorrow.
Could
Bill .... be home, I just bumped into him s few minutes ago at the gym.
can't
Martha .... have left yet. Her suitcase is still here.
can't
Gavin really ....... into diving. He goes diving every weekend.
must be
